approached significancep = 0.08
Secondary outcomes The median [IQR(range)] peri-operative change in PaO 2 /FiO 2 ratio in the PDT group was + 5.5 [− 29.3—34.8 (− 328.6–540.4)] mmHg, compared to − 2.1 [− 67.1–32.4 [− 253.2–130.8)] mmHg in the ST group, which approached significance ( p = 0.08, Table 2 ).